Question

Mount St. Helens is a volcano that erupted with great force in 1980. Which phrase best describes this eruption?

quiet eruption
gentle lava flows
magma low in silica
high-viscosity magma

Answer 1

Answer:The best phrase which supports the eruption would be high-viscosity magma lava broken into fragments.

Answer 2

high-viscosity magma

Step-by-step explanation:

High viscosity lavas flow slowly and typically cover small areas. In contrast, low viscosity magmas flow more rapidly and form lava flows that cover thousands of square kilometers.